含高渗透率分布式光伏发电系统的配电网动态等值分析

发布时间：2018-07-11 16:16

本文选题：光伏发电 + 配电网　；参考：《电力系统自动化》2017年09期

【摘要】：随着分布式光伏发电系统广泛接入配电网,渗透率不断升高,甚至超过了百分之一百,在光照比较强的时候会向输电网倒送功率,在这种情况下,负荷和分布式光伏发电系统共同主导了配电网的动态特性,对电网的暂态稳定产生了重要的影响。为此,建立了综合考虑负荷及分布式光伏发电系统动态特性的配电网动态等值模型,即在综合负荷模型的基础上增加一个等效的光伏电站,然后通过动态轨迹灵敏度法筛选重要参数,在DIgSILENT-MATLAB联合仿真平台上实现基于遗传算法的关键参数辨识。最后,在DIgSILENT平台中搭建了输配电网仿真算例,仿真结果表明,所提出的配电网动态等值模型能够比较准确地描述含有高渗透率分布式光伏发电系统的配电网动态特性。
[Abstract]:With the widespread access of distributed photovoltaic power generation systems to the distribution network, the permeability is increasing, and even more than 1%, when the light is relatively strong, the power will be poured back to the transmission network. In this case, The dynamic characteristics of distribution network are dominated by load and distributed photovoltaic power generation system, which has an important impact on the transient stability of power grid. Therefore, a dynamic equivalent model of distribution network considering load and dynamic characteristics of distributed photovoltaic power system is established, that is, an equivalent photovoltaic power station is added on the basis of the integrated load model. Then the important parameters are selected by dynamic trajectory sensitivity method, and the key parameters identification based on genetic algorithm is realized on the joint simulation platform of DIgSILENT-MATLAB. Finally, a simulation example of transmission and distribution network is built on the platform of DIgSILENT. The simulation results show that the proposed dynamic equivalent model can accurately describe the dynamic characteristics of distribution network with high permeability of distributed photovoltaic generation system.
【作者单位】：河海大学能源与电气学院;
【基金】：国家自然科学基金优秀青年科学基金资助项目(51422701)~~
【分类号】：TM615;TM743

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